Drive-chain



J. A. JEFFREY.

DRIVE CHAIN.

Patented July 12, 1887.

(.No Model.)

EJE 3 E .may \\\\\\\\w\ Em v E m v UNITED STATES PATENT OFFICE.

JosEFH AxJEFFREY, oF COLUMBUS, onto.

DRIVEBCHAIN.

SPECIFICATION forming part of Letters Patent No. 366.587, :lated July12, 1887.

Application lilcd March 6, i853. Serial No. 872m. (No model.)

To all whom it may concern:

Be it known that I, JosEFE: A. JEFFREY, a citizen of the United States,residing at Oolnmbns, in the county of Franklin and State of Ohio, haveinvented certain new and useful Improvements in Drive-Chains, of whichthe following is a specification, reference being had therein to theaccompanying drawings.

Figure I is a section of a wheel and chain containing my invention. Fig.2 is a top view of the chain-link. Fig. 3 is a bottom view of the saine.Fig. 4 is section of a part of a chain. Fig. 5 `is a bottom plan view ofmy improvedlink with a central sprocket-opening, and Fig. 6 is a sectionof part of a wheel ofrnodified forni with which a chain is adapted tooperate.

rIhe links of which the chain is composed are detachable one from theother, and they may be constructed iu any of the many ways now known formaking detachable links. To permit detachability, however, I prefer thestyle of coupling devices which I have shown in the drawings, but whichI do not claim as my invention.

A represents a hook; B, an end baror crossbar adapted to engage with thehook A of an adjacent link. The body of the link is formed of acontinuous plate or bar, C, through which there is made the aperture D,to leave the cross-piece B forengaging withthe hook. The body part ofthelink may be of any required thickness, it varying in that respectaccording to the purpose for which the chain is made and to which it isto be applied.

- Upon the under side ot' the body part of the link there are formedribs or eorrngations, providing the means by which engagement with thewheel is effected.

Then preferred, the under side of the link may be recessed or madeconcave, as indicated at b, Figs. 2 and 3, to provide for the receptionof the hook, while at the same time permitting the lower face ofadjacent links of the chain to be in a plane. Such recess may be eithereast in the link, or may be formed therein by swaging or striking up;but I do not wish to be limited to such construction.

In Fig. l I'have shown this chain in combination with a wheel having aribbed or corrugated surface which is especially adapted to be traversedby the chain and to run at high rates of speed.

In Fig. (i I have shown a modified ehain wheel having an iron hub,withlanges c c projecting radially from the sides of its working- I'aee.Between the flanges there is a channel to receive a lining or engagingsurface of lead or other relativelysoft metal, or of rubber, leather, orother suitable yielding or elastic material, which is adapted to securea rni frietional contact between the wheel and the chain. A wheel ofthis character is also adapted to run with less noise than would beordinarily produced by driving the chain at high rates of speed over aeast-iron wheel.

I do not in this case claim anything relating to the structure of thewheel, nor of the combination of thechain with the wheel, reserving theright to claim such subject-matter in a Vconcurrent application to betiled as a division hereof.

The herein-described drive chain link, it having a coupling-hook, A, Yat one end, a couplingbar, B, at the opposite end, the centralSprocket-aperture, and the side bars pro vided upon one face with smallribs or corrugations adapted to engage frictionally with a wheel,substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

Josnrn A. JEFFREY.

Witnesses:

J. M. 'PTnBF/rrs, Jas. H. GoDMnN.

